102012030191 has 4 divisors (see below), whose sum is σ = 102014788800. Its totient is φ = 102009271584.

The previous prime is 102012030173. The next prime is 102012030223. The reversal of 102012030191 is 191030210201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191030210201 = 139 ⋅1374318059.

It is a cyclic number.

It is not a de Polignac number, because 102012030191 - 2²² = 102007835887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012030091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1323071 + ... + 1398048.

It is an arithmetic number, because the mean of its divisors is an integer number (25503697200).

Almost surely, 2^102012030191 is an apocalyptic number.

102012030191 is a deficient number, since it is larger than the sum of its proper divisors (2758609).

102012030191 is an equidigital number, since it uses as much as digits as its factorization.

102012030191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758608.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 102012030191 its reverse (191030210201), we get a palindrome (293042240392).

The spelling of 102012030191 in words is "one hundred two billion, twelve million, thirty thousand, one hundred ninety-one".